Exercise device



FIG. 1 is a perspective view of the exercise device of the present invention showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for an exercise device, as shown and described. 